JJ72 were a rock band from Dublin, Republic of Ireland.
The band was formed in 1999 by lead singer Mark Greaney and drummer Fergal Matthews. The two recruited the third and final member Hilary Woods as bassist and formed the trio, playing gigs in Ireland while still studying for their Leaving Cert exams. In June 2006 JJ72 announced they will split after seven years and two acclaimed albums.
The band released their first album, JJ72 in Autumn, 2000, following the completion of their Leaving Cert.